Detailed explanation of the best configuration for Nginx to improve security and performance

# Do not display the Nginx version number on error pages or in the server header server_tokens off;

#Do not allow pages to be displayed from frames or iframes, which can avoid clickjacking
# http://en.wikipedia.org/wiki/Clickjacking
# If you allow [i]frames, you can use SAMEORIGIN or set your allowed urls in ALLOW-FROM
# https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options
add_header X-Frame-Options SAMEORIGIN;

#When your website is user-provided content such as a blog forum, use the X-Content-Type-Options: nosniff header,
# This is to disable content type sniffing in some browsers # https://www.owasp.org/index.php/List_of_useful_HTTP_headers
# Currently supports IE > 8 and above http://blogs.msdn.com/b/ie/archive/2008/09/02/ie8-security-part-vi-beta-2-update.aspx
# http://msdn.microsoft.com/en-us/library/ie/gg622941(v=vs.85).aspx
#Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=471020
add_header X-Content-Type-Options nosniff;

# Prevent cross-site scripting (XSS), which is currently supported by most browsers. # It is activated by default. If it is disabled by the user, you can use this configuration to activate it.
# https://www.owasp.org/index.php/List_of_useful_HTTP_headers
add_header X-XSS-Protection "1; mode=block";

#Activate Content Security Policy (CSP), which is supported by most browsers. #Tell the browser that scripts can only be downloaded from this domain and the URLs you explicitly specify.
# http://www.html5rocks.com/en/tutorials/security/content-security-policy/#inline-code-considered-harmful
add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://ssl.google-analytics.com https://assets.zendesk.com https://connect.facebook.net; img-src 'self' https://ssl.google-analytics.com https://s-static.ak.facebook.com https://assets.zendesk.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com https://assets.zendesk.com; font-src 'self' https://themes.googleusercontent.com; frame-src https://assets.zendesk.com https://www.facebook.com https://s-static.ak.facebook.com https://tautt.zendesk.com; object-src 'none'";

server {
listen 443 ssl default deferred;
server_name .forgott.com;

ssl_certificate /etc/nginx/ssl/star_forgott_com.crt;
ssl_certificate_key /etc/nginx/ssl/star_forgott_com.key;

#Enable session re-use to improve https performance# http://vincent.bernat.im/en/blog/2011-ssl-session-reuse-rfc5077.html
ssl_session_cache shared:SSL:50m;
ssl_session_timeout 5m;

# Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
ssl_dhparam /etc/nginx/ssl/dhparam.pem;

#Activate server-side protection from BEAST attacks# http://blog.ivanristic.com/2013/09/is-beast-still-a-threat.html
ssl_prefer_server_ciphers on;
# Disable SSLv3 (activated by default since nginx 0.8.19) http://en.wikipedia.org/wiki/Secure_Sockets_Layer#SSL_3.0
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
# Choosing Ciphers for Confidentiality and Compatibility # http://blog.ivanristic.com/2013/08/configuring-apache-nginx-and-openssl-for-forward-secrecy.html
ssl_ciphers "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";

# Activate OCSP stapling (mechanism by which a site can convey certificate revocation information to visitors in a privacy-preserving, scalable manner)
# http://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/
resolver 8.8.8.8;
ssl_stapling on;
ssl_trusted_certificate /etc/nginx/ssl/star_forgott_com.crt;

# Configure and activate HSTS (HTTP Strict Transport Security) https://developer.mozilla.org/en-US/docs/Security/HTTP_Strict_Transport_Security
#Avoid SSL stripping https://en.wikipedia.org/wiki/SSL_stripping#SSL_stripping
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";

# ... the rest of your configuration
}

# redirect all http traffic to https
server {
listen 80;
server_name .forgott.com;
return 301 https://$host$request_uri;
}